Curtain clip



FIG. 1 is a top plan view of a curtain clip showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a rear end view thereof;

FIG. 4 is a front end view thereof; and,

FIG. 5 is a side view thereof.

The ornamental design for a curtain clip, as shown and described.